Roger Penrose was a major key in creating the now-standard model of black holes. In the fourth installment of our six-part interview, we discuss how Penrose first became involved in black holes, as well as his key insights that developed from Einstein, Schwarzschild, and Oppenheimer's findings. Throughout his career, Penrose has challenged conventional wisdom in physics, mathematics, and the philosophy of science. He has tackled some of the most profound questions of the universe: How do quantum mechanics and cosmology shape our understanding of reality? Can human consciousness be fully explained by physical laws, or does it transcend computation? This wide-ranging conversation spans Penrose’s most influential ideas, from black holes and the Big Bang to Gödel’s incompleteness theorems, quantum gravity, and the role of mathematics in uncovering ultimate reality.